Relevant bibliographies by topics / Open pit optimization / Dissertations / Theses
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Dissertations / Theses on the topic 'Open pit optimization'

Author: Grafiati
Published: 5 September 2021
Last updated: 1 February 2022

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1

Albor, Consuegra Francisco. "Exploring stochastic optimization in open pit mine design." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=92379.

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Over recent years, new methods have been developed to integrate uncertainty into the optimization of life-of-mine (LOM) production planning. This thesis makes use of two stochastic optimization methods: simulated annealing (SA) and stochastic integer programming (SIP); which are implemented in the context of the requirements of mining applications through the use of stochastic simulation to model uncertainty. For the case of SA, the second chapter of the thesis documents the case of a copper deposit where ten simulated realizations are sufficient to provide stable LOM optimization results. In
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2

Amankwah, Henry. "Mathematical Optimization Models and Methods for Open-Pit Mining." Doctoral thesis, Linköpings universitet, Optimeringslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70844.

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Open-pit mining is an operation in which blocks from the ground are dug to extract the ore contained in them, and in this process a deeper and deeper pit is formed until the mining operation ends. Mining is often a highly complex industrial operation, with respect to both technological and planning aspects. The latter may involve decisions about which ore to mine and in which order. Furthermore, mining operations are typically capital intensive and long-term, and subject to uncertainties regarding ore grades, future mining costs, and the market prices of the precious metals contained in the or
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3

Llana-Rodriguez, A. H. "Orebody modelling and open pit optimization using exploration data." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355441.

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4

Sattarvand, Javad [Verfasser]. "Long-term open-pit planning by ant colony optimization / Javad Sattarvand." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1018966285/34.

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5

Pettingell, Michael Nash. "Cut-off grade optimization of open pit mines with multiple processing streams." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62853.

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In this study, dynamic cut-off grades and multiple processing streams are used to maximize the value of a mining project based on a finite resource. Optimal cut-off policies are generated using Lane’s method for determining cut-off grade. By maximizing the present value of future profits as a function of cut-off grade, mine project value is increased over the traditional break-even approach. A method for determining multiple cut-off grades at a single deposit was applied to analyze the impact that changes in processing capacity have on NPV. It was found that additional capacity related to a se
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6

Puell, Ortiz Jorge. "Methodology for a dump design optimization in large-scale open pit mines." TAYLOR & FRANCIS AS, 2017. http://hdl.handle.net/10150/626612.

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Modern large-scale open pit mines move hundreds of thousands of tonnes of material daily, from the loading sources to the destination zones, whether these are massive mine dumps or, to a lesser extent, to the grinding mills. Mine dumps can be classified as leach or waste dumps, depending upon their economic viability to be processed in-place, a condition that has experienced great progress in the last decades and has reconfigured the open pit haulage network with an increase in the number of dumps. Therefore, new methods for dump design optimization are of the highest priority in mine planning
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7

Achireko, Peter Kwagyan. "Application of modified conditional simulation and artificial neural networks to open pit optimization." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq39318.pdf.

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8

Nascimento, Leite Andre. "Stochastic optimization approaches to open pit mine planning : applications for and the value of stochastic approaches." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116039.

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The mine production schedule defines the sequence of extraction of selected mine units over the life of the mine, and consequentially establishes the ore supply and total material movement. This sequence should be optimized so as to maximize the overall discounted value of the project. Conventional schedule approaches are unable to incorporate grade uncertainty into the scheduling problem formulation and may lead to serious deviations from forecasted production targets. Stochastic mine production schedulers are considered to obtain more robust mine production schedule solutions.<br>The applica
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9

Vasquez, Coronado Pedro Pablo. "Optimization of the Haulage Cycle Model for Open Pit Mining Using a Discrete-Event Simulator and a Context-Based Alert System." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/321594.

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The loading cycle in an Open Pit mine is a critical stage in the production process that needs to be controlled in detail for performance optimization. A comprehensive Alert System designed to notify supervisors of cycle times that are below the required performance standards is proposed. The system gives an alert message when one or several trucks are idle or the time of completing production tasks are over a predefined value. This alert is identified by the system and compared with pre-established Key Performance Indicators (KPIs) in order to determine corrective actions. The goal is to dete
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10

De, Carli Carla. "Análise de projetos limite : lavra a céu aberto x lavra subterrânea." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/77760.

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Com o passar dos anos a sociedade tem se tornado gradativamente mais dependente de recursos minerais para o seu funcionamento e para o desenvolvimento de produtos. A maior parte das coisas que cercam o homem necessita de alguma espécie de bem mineral como matéria prima para sua fabricação. Por isso, cada vez mais, a mineração tem sido objeto de estudos, buscando aprimoramento e desenvolvimento nos métodos de extração de minérios. Existem duas formas utilizadas para a extração de bens minerais, uma por uso de métodos de lavra a céu aberto (OP) e outra através da aplicação de métodos para lavra
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11

Björk, Carl Johan. "PID tuning with Ant Colony Optimization (ACO) : A framework for a step response based tuning algorithm." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-33903.

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The building automation industry lacks an affordable, simple, solution for autonomous PID controller tuning when overhead variables fluctuate. In this project, requested by Jitea AB, a solution was developed, utilising step response process modelling, numerical integration of first order differential equations, and Ant Colony Optimization (ACO). The solution was applied to two control schemes; simulated outlet flow from a virtual water tank, and the physical air pressure in the ventilation system of a preschool in Sweden. An open-loop step response provided the transfer function in each case,
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12

Chapman, Andrew. "A Field Study on Haul Time Variability in Open Pit Mines." Thesis, 2012. http://hdl.handle.net/1974/7410.

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As open pit mines get larger and their road networks more complex, haul road traffic is an area of increasing concern for mine operators. In particular, engineers from Barrick Gold Inc. have observed haul truck interactions in some of their larger open pit mines that are clearly disruptive to the haulage cycle. Such traffic effects cause uncertainty in haul times over identical routes and commercial dispatch systems do not explicitly account for this variability. This research, based on first-hand data collected from the Goldstrike Open Pit in Northern Nevada, focuses on assessing the level of
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13

Barr, Drew. "Stochastic Dynamic Optimization of Cut-off Grade in Open Pit Mines." Thesis, 2012. http://hdl.handle.net/1974/7180.

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Mining operations exploit mineral deposits, processing a portion of the extracted material to produce salable products. The concentration of valuable commodities within these deposits, or the grade, is heterogeneous. Not all material has sufficiently high grades to economically justify processing. Cut-off grade is the lowest grade at which material is considered ore and is processed to create a concentrated commodity product. The choice of cut-off grade at a mining project can be varied over time and dramatically impacts both the operation of the mine and the economics of the project. The majo
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14

Sattarvand, Javad [Verfasser]. "Long-term open-pit planning by ant colony optimization / vorgelegt von Javad Sattarvand." 2009. http://d-nb.info/99566076X/34.

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15

Bye, Alan Russell. "The development and application of a 3D geotechnical model for mining optimisation Sandsloot open pit platinum mine South Africa." Thesis, 2003. http://hdl.handle.net/10413/4114.

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Detailed geological knowledge is often a major unknown factor in open pit mining and design, and therefore poses a significant risk in the mining venture. As the knowledge of the geology improves so the risk of unforeseen conditions reduces and therefore safety and productivity can be increased. Historically, geotechnical methods and information have predominantly been used exclusively for pit slope optimisation. This research documents the procedures and developments undertaken to compile a comprehensive geotechnical database, and the application of the geotechnical data to open pit mining, b
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16

Marques, Nélio Marcelo. "Modelling and Resources Estimation for the Baucau Limestone at the Block I Mine 1 and Mine 2, Baucau Municipality - Timor Leste." Master's thesis, 2019. http://hdl.handle.net/10316/93612.

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Dissertação de Mestrado em Geociências apresentada à Faculdade de Ciências e Tecnologia<br>A área em estudo localiza-se no municipio de Baucau, Timor-Leste. O Municipio de Baucau confina com o municipio de Lautem a este, com o Manatutu a oeste, com o de Viqueque a sul e com o estreito de Wetar a norte. Fica a aproximadamente 120km a este de Dili, a capital da República de Timor Leste. As áreas concessionadas são referidas por Bloco I-1, Bloco I-2, e Bloco II.Para o calcário de Baucau na área de concessão no bloco I-Mina1 e Mina2, a modelação e a estimativa de recursos são ferramentas críticas
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